不太会做When you leave the roommake sure the lights_____Awill be turned off B will be turned on C turn off D have turned off 我觉得是D,答案却是A,这是为什么呢?

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不太会做Whenyouleavetheroommakesurethelights_____AwillbeturnedoffBwillbeturnedonCturnoffDhaveturnedoff我觉

不太会做When you leave the roommake sure the lights_____Awill be turned off B will be turned on C turn off D have turned off 我觉得是D,答案却是A,这是为什么呢?
不太会做
When you leave the roommake sure the lights_____
Awill be turned off B will be turned on
C turn off D have turned off
我觉得是D,答案却是A,这是为什么呢?

不太会做When you leave the roommake sure the lights_____Awill be turned off B will be turned on C turn off D have turned off 我觉得是D,答案却是A,这是为什么呢?
只能选A.
因为D要对的话,必须是被动语态!即:
have been turned off